Hi Waervyn
No, it should not make a difference.
You need to be down around 30 metres to get a decent hydrophone contacts bearing.
Sometimes a faint contact can be a ship moving a long way from you.
Slow moving contacts around 5 knots can also be a problem sometimes.
Quite often you can pickup more than your Sonarman does when you operate it yourself.
Hydrophone Tracker v1.1b Tool For 4 Bearings Method By Gutted
Post #22 4 Bearing Method By Kuikueg + Video Links
Post #49 Lost Your Bearings? > This Might Just Put You Right
Post #57 Using The 4 Bearing True Method By Trevally
Peter